Liu Xiaobo died in 2017, the first Nobel Laureate to do so in detention since 1935. Liu was a pre-eminent Chinese literary critic, professor and humanitarian activist. After his hunger strike in Tiananmen Square in June 1989 he became a thorn in the side of the Chinese government, helping to write the Charter 08 manifesto calling for free speech, democratic elections and basic human rights. He was arrested and convicted on charges of 'incitement...